Change Source
Recommended NetEase's Open source mirror station mirrors.163.com
How to use See mirrors.163.com/.help/ubuntu.html
Take my ubuntu14.04 now for example, then change the following red part to trusty (this is the version of the code), and then modify the source.list just fine
Deb http://mirrors.163.com/ubuntu/ karmic main restricted universe multiverse
Deb http://mirrors.163.com/ubuntu/ karmic-security main restricted universe multiverse
Deb http://mirrors.163.com/ubuntu/ karmic-updates main restricted universe multiverse
Deb http://mirrors.163.com/ubuntu/ karmic-proposed main restricted universe multiverse
Deb http://mirrors.163.com/ubuntu/ karmic-backports main restricted universe multiverse
DEB-SRC http://mirrors.163.com/ubuntu/ karmic main restricted universe multiverse
DEB-SRC http://mirrors.163.com/ubuntu/ karmic-security main restricted universe multiverse
DEB-SRC http://mirrors.163.com/ubuntu/ karmic-updates main restricted universe multiverse
DEB-SRC http://mirrors.163.com/ubuntu/ karmic-proposed main restricted universe multiverse
DEB-SRC http://mirrors.163.com/ubuntu/ karmic-backports main restricted universe multiverse
Execute sudo apt-get update package list after modification is complete
The use of Apt-get
Baidu Encyclopedia, Simple and detailed:
Http://baike.baidu.com/view/1580236.htm
The use of dbkg
Baidu Encyclopedia:
Http://baike.baidu.com/view/1314054.htm
Ubuntu Software Management